Resolver External Conductor Fixing Structure

ABSTRACT

The present invention provides a resolver external conductor fixing structure in which a connection body to which leads are connected is formed detachable from a terminal pin holding part so that the leads can be disconnected during the assembly of a resolver and connected after the assembly. An insulation cover ( 100 ) is formed on a ring-like stator ( 1 ) by integral molding, a terminal pin holding part ( 8 ) is formed at a part of the insulation cover ( 100 ), and a connection body ( 101 ) having leads ( 11 ) is formed detachable from the terminal pin holding part ( 8 ). Thus, during the assembly of the resolver, the leads ( 11 ) can be disconnected, and after the resolver is assembled, the leads ( 11 ) can be connected.

TECHNICAL FIELD

The present invention relates to a resolver external conductor fixing structure, and more particularly, to a novel improvement for making a connection body with which leads are connected detachable from a terminal pin holding part to expose lead connecting portions of terminal pins to an outside of the terminal pin holding part so that the leads can be connected with the lead connecting portions after the assembly of a resolver.

BACKGROUND ART

Examples of the above-mentioned type of resolver external conductor fixing structure which has been used up to now include a structure shown in FIGS. 5 and 6, which is described in Patent Document 1.

That is, in FIGS. 5 and 6, reference numeral 1 denotes a ring-shaped stator having a plurality of salient poles 2 which protrude inwardly. First and second ring-shaped insulating covers 5 and 6, each of which has a shape covering the respective salient poles 2, are provided on first and second end surfaces 3 and 4 of the ring-shaped stator 1.

The respective salient poles 2 are wound with stator coils 7 through the respective ring-shaped insulating covers 5 and 6. A terminal pin holding part 8 extended in a diameter direction is integrally formed in a part of an outer edge of the first ring-shaped insulating cover 5 which is one of the respective ring-shaped insulating covers 5 and 6.

Each of coil connecting parts 9 a protruding above one end of each of terminal pins 9 which is integrally provided in the terminal pin holding part 8 by insert molding or the like is connected with bundled end wires of the stator coils 7.

As shown in the cross sectional view of FIG. 6, each of the terminal pins 9 is formed such that the entire shape thereof is bent in an L-shape. A lead connecting portion 10 including a swaging part protruding in a lateral direction of the other end of each of the terminal pins 9 is connected with leads 11. The lead connecting portion 10 is tightly connected with the leads 11 by swaging.

Patent Document 1: U.S. Pat. No. 6,028,383

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention

A conventional resolver external conductor fixing structure is constructed as described above, and therefore has the following problems.

That is, in a manufacturing process for manufacturing a resolver, a stator is supplied to an assembly line with a state in which leads are fit to a lead connecting portion for respective terminal pins by, for example, application of a pressure. In a final step, after winding is completed, end wires of stator coils are bundled and connected with the coil connecting parts. Therefore, the stator is moved on the assembly line with a state in which the leads are continuously connected with the lead connecting portion in all steps including a winding step, so that handling is inconvenient. This significantly hinders an improvement in productivity.

When the number of types of leads is large, it is necessary to prepare various ring-shaped stators provided with various leads based on different lengths and types of the leads. Therefore, preparation, distinction, and the like are complicated and the number of types of jigs in the line and the number of types of equipment attachment jigs increase. This is a large problem in productivity.

It is very difficult to perform automatic production according to specifications based on a customer's request.

Means for Solving the Problems

A resolver external conductor fixing structure according to the present invention includes: an insulating cover including first and second ring-shaped insulating covers formed on first and second end surfaces of a ring-shaped stator by integral molding; a terminal pin holding part integrally formed with a part of the insulating cover; a connection body which is provided detachable from the terminal pin holding part and includes leads; terminal pins provided in the terminal pin holding part; a coil connecting part formed in one end of each of the terminal pins; and a lead connecting portion formed in the other end of each of the terminal pins, in which the lead connecting portions of the terminal pins are exposed to an outside and the leads are connected with the lead connecting portions with a state in which the connection body is connected with the terminal pin holding part. Further, in the structure, the coil connecting part is extended to a side of the first end surface of the ring-shaped stator in an axial direction; and the lead connecting portion is extended to a side of the second end surface of the ring-shaped stator in the axial direction. Further, in the structure, each of the terminal pins is bent stepwise. Further, in the structure, an outer surface and an inner surface of each of the lead connecting portions are exposed to the outside and can be connected with each of the leads. Further, in the structure, the lead connecting portion has a flat plane shape. Further, in the structure, the connection body comprises a plurality of lead guide holes formed therein, for guiding the leads.

Effects of the Invention

The resolver external conductor fixing structure according to the present invention has the above-mentioned structure. Therefore, the following effects can be obtained.

(1) The connection body with which the leads are connected is formed detachable from the terminal pin holding part. The stator coils are bundled and connected with the terminal pins. In a final stage, the connection body is mounted on the terminal pin holding part to connect the leads with the lead connecting portions. Therefore, while the ring-shaped stator moves on an assembly line, the leads and the like are not connected. Thus, there is no trouble during assembly, with the result that production efficiency is improved and automation is facilitated.

(2) The assembly can be performed without depending on a type of a lead, so that final assembly is easy and parts control is significantly facilitated. The leads are fit in a final step, so line facilities can be simplified and a change in plan which is caused due to a change in harness can be minimized by unifying management of harness parts.

(3) Each of the lead connecting portions has a plate shape, so the leads can be connected with both surfaces thereof. Even after a resolver is attached to a device, the leads can be connected with the lead connecting portions. Therefore, the assembly of the device to which the resolver is attached can be significantly facilitated and simplified.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 A plan view showing a resolver external conductor fixing structure according to the present invention.

FIG. 2 A cross sectional view of FIG. 1.

FIG. 3 An exploded perspective view showing a state before lead connection in FIG. 1.

FIG. 4 A perspective view showing a state after lead connection in FIG. 1.

FIG. 5 A plan view showing a conventional resolver external conductor fixing structure.

FIG. 6 A cross sectional view of FIG. 5.

BEST MODE FOR CARRYING OUT THE INVENTION

An object of the present invention is to provide lead connecting portions in openings of a terminal pin holding part to enable connection of leads with the lead connecting portions after stator coils are connected with terminal pins, thereby significantly improving the assembly convenience of a resolver.

Embodiment

Hereinafter, a resolver external conductor fixing structure according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

In the following description, the same reference symbols are used for parts identical or equivalent to those in a conventional example.

In FIGS. 1 and 2, reference numeral 1 denotes a ring-shaped stator having a plurality of salient poles 2 which protrude inwardly. An insulating cover 100 including first and second ring-shaped insulating covers 5 and 6, each of which has a shape covering the respective salient poles 2, is provided to first and second end surfaces 3 and 4 of the ring-shaped stator 1 by integral molding such as insert molding.

The respective salient poles 2 are wound with stator coils 7 through the respective ring-shaped insulating covers 5 and 6. A terminal pin holding part 8 which is integrally formed with the insulating cover 100 by integral molding and extended in a diameter direction is integrally formed in a part of an outer edge of the insulating cover 100.

A plurality of terminal pins 9 which are integrally provided by insert molding or the like and in which the entire shape is stepwise are provided on the terminal pin holding part 8. Each of coil connecting parts 9 a which is located above one end of each of the terminal pins 9, that is, each of the coil connecting parts 9 a which protrudes to the first end surface 3 side in an axial direction, is connected with each of bundled end wires of the stator coils 7.

As shown in a cross sectional view of FIG. 2, the terminal pin 9 is formed such that the entire shape thereof is bent stepwise or made straight. A lead connecting portion 10 which is extended downward from the terminal pin 9 (to the second end surface 4 side), that is, to the second end surface 4 side in the axial direction and formed in a plate shape is extended to a side opposed to the coil connecting part 9 a.

Bundled end wires of the stator coils 7 are connected with the coil connecting parts 9 a and then fixed thereto by soldering, welding, or the like. A connection body 101 which includes leads 11 provided in lead guide holes 20 and has a box shape is formed above the terminal pin holding part 8. An engaging hole 110 of the connection body 101 is engaged with an engaging protrusion 111 of the terminal pin holding part 8 such that the connection body 101 is detachable from the terminal pin holding part 8.

The lead connecting portion 10 of the terminal pin holding part 8 has a structure particularly developed in the present invention. Openings 21 and 22 are formed in an outer surface 10 b and an inner surface 10 a of the lead connecting portion 10, so that the inner surface 10 a and the outer surface 10 b of the lead connecting portion 10 are exposed to an outside and formed in a flat plate shape. The openings 21 and 22 can be covered with, for example, caps which are not shown.

Next, a case where a resolver is assembled using the resolver external conductor fixing structure according to the present invention which is constructed as described above will be described.

First, as shown in FIG. 1, until the end wires of the stator coils 7 are connected with the coil connecting parts 9 a of the terminal pins 9 on an assembly line (not shown), the ring-shaped stator 1 which is automatically assembled and in which the respective salient poles 2 are wound with the stator coils 7 is moved on the assembly line with a state in which the connection body 101 including the leads 11 is not connected with the terminal pin holding part 8.

A resolver stator 30 assembled as described above without performing only a lead 11 connecting process is not connected with the lead 11 on the assembly line unlike a conventional case. Therefore, handling is easy and the automation of assembly is extremely facilitated.

In the resolver stator 30, after the above-mentioned assembly process is completed, the connection body 101 is mounted on the terminal pin holding part 8 with a state in which leads based on specifications on a user's side or the leads 11 corresponding to, for example, another harness, are inserted into the lead guide holes 20. A jig is inserted from the opening 21 or 22. The leads are connected with and fixed to the lead connecting portion 10 welding, soldering, or the like. 

1. A resolver external conductor fixing structure, comprising: an insulating cover (100) including first and second ring-shaped insulating covers (5, 6) formed on first and second end surfaces (3, 4) of a ring-shaped stator (1) by integral molding; a terminal pin holding part (8) integrally formed with a part of the insulating cover (100); a connection body (101) which is provided detachable from the terminal pin holding part (8) and includes leads (11); terminal pins (9) provided in the terminal pin holding part (8); a coil connecting part (9 a) formed in one end of each of the terminal pins (9); and a lead connecting portion (10) formed in the other end of each of the terminal pins (9), wherein the lead connecting portions (10) of the terminal pins (9) are exposed to an outside and the leads (11) are connected with the lead connecting portions (10) with a state in which the connection body (101) is connected with the terminal pin holding part (8).
 2. A resolver external conductor fixing structure according to claim 1, wherein: the coil connecting part (9 a) is extended to a side of the first end surface (3) of the ring-shaped stator (1) in an axial direction; and the lead connecting portion (10) is extended to a side of the second end surface (4) of the ring-shaped stator (1) in the axial direction.
 3. A resolver external conductor fixing structure according to claim 1, wherein each of the terminal pins (9) is bent stepwise.
 4. A resolver external conductor fixing structure according to claim 1, wherein an outer surface (10 b) and an inner surface (10 a) of each of the lead connecting portions (10) are exposed to the outside and can be connected with each of the leads (11).
 5. A resolver external conductor fixing structure according to claim 1, wherein the lead connecting portion (10) has a flat plane shape.
 6. A resolver external conductor fixing structure according to claim 1, wherein the connection body (101) comprises a plurality of lead guide holes (20) formed therein, for guiding the leads (11). 